10
To avoid possible damage to the meter or to the equip-ment under test,
disconnect circuit power and discharge all high-voltage capacitors before
measuring resistance.
Note
–
The meter provides an open voltage
≦
–1.5V to the circuit under test that
causes the diode or transistor junction to conduct,
so it is better to disconnect the
resistance from the circuit to get a correct measurement.
The resistance of test leads is about 0.1
Ω
~ 0.2
Ω.
To test the leads resistance, touch
the probe tips together. For accurate measurement in low resistance.
R
UNKNOWN
=
R
MEASUREMENT
-
R
TEST LEAD
Caution
Measuring DC µA, DC A, AC A Current
Never attempt an in
–
circuit measurement where the open
–
circuit potential
to earth potential is greater
than 500V for
example a 3-phase system
measurement; you may damage the meter or be injured.
Warning
(Not IDM 71)
Making Basic Measurements
